Snubbed truck



March 2, 1954 s 2,670,695

QSNUBBED TRUCK Filed April 30, 1949 INVENTOR. Lawrence F B02201:

Patented Mar. 2, 1 954 Lawrence Fr. Ramos; (lhicasoa Ill..

ssignor to AmQriwnhS eeLFoundries Chicago, 111., a cor poration.of- .New. Jersey ApplicationApr-iI-W, 1949, Serial No. 90,691"

This invention relates. to railway car trucksand more particularly to a truck incorporating novel means for snubbing relative moizementsrbea tween the bolster and theside frames.

. A; general object. of the invention is. to provide a truck. wherein. friction. shoes are wedged; be; tweenthe bolster and friction membersmounted on the frame, the shoes being urged. into the wedgedv positions.v thereof by-"springpmeans. react.-. ing between the respective shoes. and friction members v Afurther; object of the. invention is to provide a truck .wherein. the bolster; is partially supported throughv frictionnleans fromthe columns; of the sideframe.

A more specific object. ofv the. invention. is. to provide. a. truckwhereina; frictionshoe. is. we ged between. each. side. of. the holster; and. a. fricti member pivotally mounted Oligthe; adjacent side frame. column; on a substantially; horiz nt l. axis.- extending transversely of the frame the shoes being maintained. in wedge engagement with the bolster. andv in. frictional engagement. with. they respect ve fri tion. members. and. the friction members being maintained in position on the columns by spring means reactingbetween each shoe and the relatedfriction.member A different object of they inventionis to; design a quick wheel change truck wherein. the side frame isprorided with a bolster openingwidened at: its upper end to accommodate the outboard guide lugs or the bolster for assembly and disassembly of. the bolster and the. side frame and wherein friction members are removably mounted on the side frame and extend into the widened portion of the bolster opening to prevent the passage of said outboard bolster guide. lugs therethrough to prevent accidental separation of the bolster and the side frame.

Another object is to provide a friction ar rangement between the bolster and the side. frame, which will cushion shocks laterally of the bolster as during coupling and uncoupling of the associated vehicle.

Theseand other objects of the, invention, will become more apparent. from the. specification and the drawings, wherein:

Figure 1-is a fragmentary side elevational view, partly in section, of a railway car truck incorporating the invention, thesection being taken substantially on. the line lj-l" of Figure 2;

Figure. 2"is a sectional view taken in theplanes. indicated. by the line 2'f -2 of Figure 1; and

Figure 3 is. a vertical sectional view taken sub.- stantially o the line. 3-3;. of; Figure 1 withthe bolster removed;

Describing. the invention, in. detail'.. the. truck. comprises. a side. frame, generally designatedat. 2; said. frame; including tension, and. compression members 4 and 6 and spacedcolumns 8,; 8 mere." ing' with said. tension. and compression. members and: defining a bolster opening in therewith.

The tension member below th bolster-open ing. it isof box 'section and; comprises; spacedatop, and bottom; chords; l2 and M, inboardandoutsboard Walls 16 and I8 and an intermediate wall 20. The top chord i2. is: widened to. pr vidaa spring seat 22. The top chord is reinforced at its lateral ends. by inboard and. outboard gussets 24 and. 26 merging with-theunderside of? thetop chord and with. the external. sides of. the Wall-s l6 and 18, respectively. The. lateral. ends of the top chord ar additionally.reinforced by inboard and outboard gusset 28.. and 3B integral with; the inboard and outboard walls; 3.2 and. 34 of the columns 8, 8- and merging with. the top sideof; said chord l-Z. The chord lz merges at cachet its longitudinalends with, the lower endof a transverse wall. 35 of each column, said trans? verse wall interconnecting the inboard. and cut board walls 32 and; 3.4 of the associated. column"; The; surface 22 affords a. seat for the, v lower, ends of a group of bolster-supporting springs 36; the: upper ends. of the; springs seating against a. bottomv wall 38 of a bolster,v generally desiee nated 40. The bolster 40, in addition to the bottomrwall 38,..comprises, a top wall 4.2. and spacedrw lls fi'd, 44 andan intermediate wall 4.6 interconnecting the-top and bottom walls.

Each side of the. bolster is, providedv with. a. pocket. 48 definedbyspaced inboard and out board. walls 511 and 52. extending transversely. of, the-bolster and an intervening diagonal Wall 5.4 sloping upwardly toward the adjacent. column. The walls 50, 52 and'54 are disposed'between the. top and. bottom. walls. 42. and 3.8. of the bolster and formed integral therewith...

A. friction shoe 5.6. is. received. Withineach pocket 48., the shoe being generally triangular in side elevation and. comprising. a diagonalilwalli 5B in en a m nt with the wall 54 of theassociated pocket. The wall 5.3 of. the shoe. is. connected at. itsupper end to. the upper extremity of. @5111 stantially vertical front or friction walltiii of; the, shoe. The lower end ofwall Bil; merge with a substantially horizontal or. spring eat wall 52 of the shoe said wall 62. merging with the lower end of wall 58 and providing a seat for. the upper end of a shoe-actuating compression spring M and. is provided with a spring positioning; boss, extending into into the spring 64'.

The lower end of the spring 64 seats on a horizontal leg or spring seat portion 68 of an L- shaped friction member or panel Ill. The leg 68 is spaced from web I2 and is provided on its top side with a boss I2 for positioning the lower end of the spring 64.

The friction panel I comprises an arm or substantially vertical plate portion 14 extending upwardly from leg 68 between the inboard and outboard walls 32 and 34 and spaced from wall 35 of the related column and is provided with a generally vertical friction surface engaged with the adjacent shoe 56 as at I6. The plate 74 is provided with spaced inboard and outboard guide flanges I I and I9 positioned at opposite sides of the associated shoe 56 adjacent and paralleling the inboard and outboard walls 32 and 34, respectively, of the associated column 8. Each friction member I0 is pivoted on a substantially horizontal axis extending transversely of the frame by means of inboard and outboard trunnions I8 and 89 formed at opposite sides of the plate I4 intermediate the ends thereof. Trunnion I8 is entered into a slot 82 in the inboard wall 32 of the associated column 8 and trunnion 80 within a slot 84 in the outboard wall 34 of the associated column 8. It will be noted that the slots 82 and 84 extend downwardly and that the trunnions I8 and 89 pivot as at 86 and 88, respectively. As best seen in Figure 3, the plate I4 is tapered downwardly at the lower ends of its lateral edges and the lower ends of the flanges are preferably terminated above the taper of the plate.

It will benoted that each spring e4 performs the function of urging the related shoe 56 upwardly into the associated pocket 48 of the bolster and along the wall 54 of the pocket into frictional engagement as at I6 with the adjacent plate portion 14 of the friction member ID, and, in addition, each spring 64 urges the associated friction member I9 downwardly whereby the trunnions I8 and 80 are retained in the slots and engaged as at 86 and 88 with the inboard and outboard walls 32 and'34 of the related column 8. Each friction member ID is swingably supported from the frame and is pivotal in a vertical plane extending longitudinally of the frame and the guides I'! an I9 strengthen the plate I4 and guide the associated shoe and prevent the sides of the shoe from wearing the column walls 32 and 34.

The bolster is provided at opposite sides thereof with inboard and outboard lugs 99 and 92 embracing the associated column therebetween for interlocking the bolster therewith.

To disassemble the truck shown in Figure l, the bolster is elevated to the top of the opening Ill, thereby relieving compression on the bolstersupporting springs 36 and the springs 64. The springs 64 and 36 are removed, whereupon the shoes 56 are caused to drop out of the pockets 48 and removed. Each friction member 10 is then moved away from the related column to disen gage the trunnions I8 and 89 from the slots 82 and 84 whereupon each friction member is moved downwardly to withdraw the upper ends thereof from the widened upper portion 94 of the bolster opening It! to accommodate passage of the outboard lugs 92 of the bolster to permit disassembly of the bolster with the frame. The friction members 19 are removed with the bolster.

It will be noted that the friction plate portions of the friction members I0 in the assembled position of the parts as shown in Figure l, extend upwardly into the widened portion 94 of thebol'ster opening and thus prevent the lugs 92 from passing through said widened portion of the bolster opening. The friction members thus serve as auxiliary locking means for the bolster.

I claim:

1. In a truck, a side frame comprising spaced columns, a bolster spring-supported from said frame between said columns, a pocket in each side of said bolster comprising a diagonal surface sloping upwardly toward the adjacent column, friction members disposed at opposite sides of said bolster and each pivoted intermediate its ends from intermediate the ends of the adjacent column on an axis extending longitudinally of the bolster, each member comprising a friction plate extending along the adjacent side of said bolster and a spring seat extending beneath the bolster, a friction shoe in each pocket in complementary engagement with the surface therein and in frictional engagement with the plate of the adjacent friction member, and a spring compressed between eachshoe and the spring seat of the adjacent friction member.

2. In a railway car truck, a side frame comprising tension and compression members and spaced columns defining a bolster opening with a widened portion at its upper end, a bolster springsupported on said tension member in said opening and having inboard and outboard guide lugs engageable with respective faces of said columns, said outboard lugs being dimensioned to pass through said widened portion of said opening in the assembly and disassembly of said bolster with said frame with respect to said opening, and fric-. tion means between said bolster and said columns including a friction element pivotally mounted on each column and movable relative thereto and projecting into said widened portion of said opening to prevent passage of said outboard lugs through said opening until said elements are disassembled from said columns.

3. In a railway car truck, a side frame having a column with a widened portion formed therein, an L-shaped friction panel pivoted to the column and comprising a leg and a vertically disposed arm substantially perpendicular thereto and a spring-supported bolster having inboard and outboard lugs adapted to embrace the column, the bolster being inserted through the widened portion in assembly, and a shoe spring-supported from the leg and frictionally engaged with the arm and operatively engaged with the bolster for actuation, said arm extending into said widened portion to prevent accidental disassembly.

4. In a truck, a side frame member, a bolster member spring-supported therefrom, a friction element pivoted from one of said members on an axis located immediately adjacent to said bolster member and extending transversely of said frame member, a friction shoe in engagement with the other of said members along asurface sloping toward said element andin frictional engagement with said element along a surface extending transversely of said frame member, and resilient means exerting a force substantially parallel to said last-named surface and reacting between said shoe and said element.

5. In a truck, a side frame comprising a column,

' a bolster spring-supported from said frame and having a pocket open to said column, a wedge surface in said pocket sloping toward said column, a friction member removably mounted .on said column and comprising a friction plate portion disposed between said column and said bolster, and a spring seat portion at one end of said plate portion extending beneath said bolster, a shoe within said pocket in wedge engagement with said surface and in frictional engagement with said plate portion, and a spring compressed between said shoe and said spring seat portion, said friction member being rotatable longitudinally of the frame on an axis located slightly below the area of engagement of the shoe with the plate in normal position of the bolster.

6. In a truck, a side frame comprising spaced columns, a bolster spring-supported from said frame between said columns, a friction member disposed at each side of the bolster and having a vertical portion pivoted on a substantially horizontal axis intermediate its ends from the adjacent column intermediate the ends thereof, said bolster being movable in a region above and below the axes of pivot of said members, a shoe pocketed in each side of the bolster in wedge engagement therewith and in frictional engagement with the adjacent friction member between guide means thereon, each friction member having a spring seat at the bottom of the vertical portion thereof, and resilient means compressed between each shoe and the spring seat of the related friction member.

7. In a railway car truck, a side frame comprising a column having spaced inboard and outboard walls, a bolster spring-supported from said frame, a friction member having pivotal means received within slots in said walls for pivotal movement of the friction member relative to said walls, said slots and pivotal means being aligned transversely of the frame, said friction member comprising a spring seat underlying said bolster,

resilient means supported on said seat, and a shoe seated on said resilient means and wedged between said bolster and said friction member, said member presenting a short lever arm above said pivotal means normally engaged by the shoe when the bolster is in the normal uppermost position thereof, and said member presenting a long lever arm below said pivotal means and normally engaged by the shoe when the bolster moves to the lowermost position thereof.

8. In a railway car truck, a side frame having a column member, a bolster member spring-supported from the frame, a friction element pivotally suspended from one of said members and presenting a substantially vertical friction surface and a spring seat angularly related to said surface and spaced vertically with respect to said bolster member, a shoe in wedge engagement with the other of said members and in frictional engagement with said surface, and spring means reacting between said seat and said shoe, said shoe engaging said element above and below the axis of pivot thereof as said bolster ascends and descends.

9. In a railway car truck, a side frame comprising a column having spaced inboard and outboard walls, a friction member having a spring seat at one end and a plate extending from said seat between said walls and pivoted therefrom, a relatively movable member spring-supported from the frame, shoe means in wedge engagement with the last-mentioned member and in frictional engagement with the plate, and resilient means reacting between said seat and said shoe means, the axis of pivot of said member lying in a horizontal "plane through which said bolster moves during vertical oscillations.

10. In a truck, a side frame member, a bolster member spring-supported therefrom, a friction element pivotally supported from one of said members for pivotal movement on an axis extending transversely of said frame member, a friction shoe in wedge engagement with the other of said members and in frictional engagement with said element along substantially vertical surfaces extending transversely of said frame member, and resilient means reacting between said element and said shoe, said element comprising an arm pivoted about said axis and frictionally engaged with said shoe and a leg disposed below said axis for support of said resilient means.

11. In a truck, a side frame comprising spaced columns, a bolster spring-supported from said frame between said columns, friction panels pivotally supported on respective columns, a friction element in frictional engagement with each panel and in wedge engagement with said bolster, and resilient means reacting between each panel and the associated element, the axes of pivot of the panels lying in a plane through which the bolster passes as it oscillates vertically.

12. In a railway car truck, a load carrying member, a vertically movable member springsupported therefrom, a friction member pivoted to said load carrying member, another friction member spring-supported from said first mentioned friction member and frictionally engaged therewith and with said movable member.

LAWRENCE F'. RAMOS.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,091,854 Hobson Aug. 31, 1937 2,346,860 Mohl Apr. 18, 1944 2,395,967 Haseltine Mar. 5, 1946 2,407,875 Geiger Sept. 17, 1946 2,434,583 Pierce Jan. 13, 1948 2,444,011 Lehrman June 22, 1948 2,458,210 Schlegel Jan. 4, 1949 

